I have for sale an intel i5 4690k, gigabyte H97N Wi-Fi board, 16 Gb Ram and a 120Gb SSD.
System is bare bones (no case no power).
I will gladly fit it to your old Pc case and power supply for you if you are just looking to upgrade your existing computer and not sure how.
£180 to wiki members and you also get the SSD which isn’t in the advert.
eBay link